What is the difference between internet and world wide web (www) ?

Internet Technology :
Difference between internet and world wide web (WWW):

The internet is a network of computers , cables , routers and other hardware and software that inter connect and run on a network . The world wide web consists of documents that are transmitted across the Internets hardware . The web documents that are transmitted  across sites . A web page is specially formatted document that can include text , graphics , hyperlinks , audio animation and video . A web site is a collection of web pages .

Information comes in many forms on the internet . To travel the internet and read , view or listen to the sights and sounds , you need a program called a browser .

What is “ALOHA net “ ?

Internet Technology :

ALOHA net :

ALOHA net was a radio network designed to allow computers in the Hawaiian Islands to communicate with each other . It was developed by Norman Abramson , a professor of Hawaii and a surfing (on real waves , not a internet ) enthusiasts . ALOHA net was a built on the idea of retransmitting packets after a small random interval if there is a collision on the network This is the basic idea used in the internet .

What is “Bandwidth” ?

Internet Technology :

Bandwidth :

When talking about computer networks , bandwidth refers to the bandwidth refers  to the capacity of the network . Bandwidth is often measured in the kilobits per second (kbps) , megabits per second (mbps) , or gigabits per seconds (Gbps) . The terms broadband , narrowband ,and midband are often used to describe the Bandwidth . These are not precisely defined , except in ordinal  sense and actual bandwidth associated with these terms in changing rapidly over time as network capacity increases . We will define broadband as at least 10Mbps , midband as 1-10 Mbps , and narrowband as less than 1Mbps .

How Ethernet helps to connected a computer into the network?

Internet Technology :

Connecting Ethernet : 

A very important LAN technology is Ethernet .This technology was developed by Robert Metcalfe and David Boggs at Xerox PARC . With Ethernet any computer on network can send data packers to any other computer on the network . However ,no two computers can “talk on the line “ at the same time there is a “collision” . Ethernet is a technology for handling these collisions and retransmitting the packets . When a collision occurs the packets are retransmitted after a very small random interval . Ethernet is a very effective protocol and it is easy to connect a computer into the network .

What is star Network?

Internet Technology :

Star Network :

  A very simple computer networks is illustrated in figure. For obvious reason this is called a star network.

  The hub at the center of  this network is a very simple piece of networking hardware that takes the data from one computer in the network and passes them on to the other computer in the network.

The network illustrated in the figure is known as Local Area Network (LAN) . A LAN is a communication network consisting of cables, computers and network devices confined to a very small geographic region such as a single building, or floor of a building.

What is packet?

Internet Technology :
Packet :

   When sending a message over a network (e.g: an email), the message is usually broken up into a smaller set of messages I mean network that transfer blocks of information is called packets.

   Subset of message are equal in length.